Child birth is the most miraculous time of a human beings life. It takes a period of 9 months and a new human baby is brought into this life.
Being pregnant simply means that the female stops having menstrual cycles because the child is in the process of formation. Every specie has a designated time period in which the reproduction process completes. For human beings, it is nine months, for cats, it is 2 months and it varies.
A woman who had her last menstrual period on February 14th, would expect child birth on October 14th. It can be before or after too.
